Waste Water Engineering If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is 200 ppm 100 ppm 50 ppm 150 ppm 200 ppm 100 ppm 50 ppm 150 ppm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For treating the sewage of a large city, you will recommend A sedimentation tank and an activated sludge treatment plant None of these Sedimentation tanks with high rate trickling filters A plant consisting of Imhoff tanks with low rate trickling filters A sedimentation tank and an activated sludge treatment plant None of these Sedimentation tanks with high rate trickling filters A plant consisting of Imhoff tanks with low rate trickling filters ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The rate of accumulation of sludge in septic tanks is recommended as 30 litres/person/month 30 litres/person/year 25 litres/person/year 25 litres/person/month 30 litres/person/month 30 litres/person/year 25 litres/person/year 25 litres/person/month ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The underground sewers are more subjected to Compressive force Bending force Tensile force Shearing force Compressive force Bending force Tensile force Shearing force ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The asbestos cement sewers are Susceptible to corrosion by sulphuric acid All of these Not structurally strong to bear large compressive stress Light in weight Susceptible to corrosion by sulphuric acid All of these Not structurally strong to bear large compressive stress Light in weight ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the velocity of flow should not be More than 20 m/sec Less than the self-cleansing velocity Less than 10 m/sec More than the self-cleansing velocity More than 20 m/sec Less than the self-cleansing velocity Less than 10 m/sec More than the self-cleansing velocity ANSWER DOWNLOAD EXAMIANS APP
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